JPS54147836A - Charge phase control unit of ink jet printing - Google Patents

Charge phase control unit of ink jet printing

Info

Publication number
JPS54147836A
JPS54147836A JP5622578A JP5622578A JPS54147836A JP S54147836 A JPS54147836 A JP S54147836A JP 5622578 A JP5622578 A JP 5622578A JP 5622578 A JP5622578 A JP 5622578A JP S54147836 A JPS54147836 A JP S54147836A
Authority
JP
Japan
Prior art keywords
charging
drops
ink
polarity
ink drops
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5622578A
Other languages
Japanese (ja)
Other versions
JPS6132150B2 (en
Inventor
Masanori Horiie
Koichiro Jinnai
Kyuhachiro Iwasaki
Yutaka Kodama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP5622578A priority Critical patent/JPS54147836A/en
Priority to US06/033,125 priority patent/US4217595A/en
Publication of JPS54147836A publication Critical patent/JPS54147836A/en
Publication of JPS6132150B2 publication Critical patent/JPS6132150B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/115—Ink jet characterised by jet control synchronising the droplet separation and charging time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/06—Heads merging droplets coming from the same nozzle

Abstract

PURPOSE:To perform phase controlling without increasing ink jet head length by charging the ink drops by a charging electrode to a polarity opposite from the charging polarity at the printing for successive two or more drops and charging to neutral or the same polarity for the next two or more drops. CONSTITUTION:Ink liquid is injected from a nozzle 2 in the form of ink drops by being applied with vibrations with an excitation signal generator 7. The ink drops emitting through a charging electrode 3 are detected by an ink drop detecting means 11 and a frequency discrimination circuit 12 discriminates frequencies by integrating the ink drop detecting signal pulses. When said frequency is below the judgement value, said circuit emits a significance signal and the phase of the charging signal is determined by a phase setting circuit 10. Charging of the ink drops is accomplished by charging the successive two or more drops to a polarity opposite from the charging polarity at the printing and to neutral or the same polarity for the next two or more drops by the retrieval signal generator, whereby there is no need for making head length particularly long. In addition, the accuracy of detection is enhanced because two or more ink drops agglomerate and are detected as large diameter ink drops.
JP5622578A 1978-04-27 1978-05-12 Charge phase control unit of ink jet printing Granted JPS54147836A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5622578A JPS54147836A (en) 1978-05-12 1978-05-12 Charge phase control unit of ink jet printing
US06/033,125 US4217595A (en) 1978-04-27 1979-04-25 Charging phase control device for ink jet recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5622578A JPS54147836A (en) 1978-05-12 1978-05-12 Charge phase control unit of ink jet printing

Publications (2)

Publication Number Publication Date
JPS54147836A true JPS54147836A (en) 1979-11-19
JPS6132150B2 JPS6132150B2 (en) 1986-07-24

Family

ID=13021153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5622578A Granted JPS54147836A (en) 1978-04-27 1978-05-12 Charge phase control unit of ink jet printing

Country Status (1)

Country Link
JP (1) JPS54147836A (en)

Also Published As

Publication number Publication date
JPS6132150B2 (en) 1986-07-24

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